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/* Copyright (c) 1992 Regents of the University of California */ |
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> |
/* Copyright (c) 1996 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
6 |
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7 |
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/* |
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* rpict.c - routines and variables for picture generation. |
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* |
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* 8/14/85 |
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*/ |
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#include "ray.h" |
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#include <sys/resource.h> |
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#else |
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#include <sys/times.h> |
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#include <sys/utsname.h> |
24 |
< |
#include <limits.h> |
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> |
#include <unistd.h> |
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#endif |
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#endif |
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|
61 |
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int directvis = 1; /* sources visible? */ |
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double srcsizerat = .25; /* maximum ratio source size/dist. */ |
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|
64 |
+ |
COLOR cextinction = BLKCOLOR; /* global extinction coefficient */ |
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COLOR salbedo = BLKCOLOR; /* global scattering albedo */ |
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double seccg = 0.; /* global scattering eccentricity */ |
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double ssampdist = 0.; /* scatter sampling distance */ |
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|
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double specthresh = .15; /* specular sampling threshold */ |
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double specjitter = 1.; /* specular sampling jitter */ |
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|
72 |
+ |
int backvis = 1; /* back face visibility */ |
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|
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int maxdepth = 6; /* maximum recursion depth */ |
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double minweight = 5e-3; /* minimum ray weight */ |
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|
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COLOR ambval = BLKCOLOR; /* ambient value */ |
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int ambvwt = 0; /* initial weight for ambient value */ |
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double ambacc = 0.2; /* ambient accuracy */ |
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int ambres = 32; /* ambient resolution */ |
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int ambdiv = 128; /* ambient divisions */ |
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|
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#define pixjitter() (.5+dstrpix*(.5-frandom())) |
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|
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static int hres, vres; /* resolution for this frame */ |
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int hres, vres; /* resolution for this frame */ |
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|
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extern char *mktemp(); |
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|
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#ifndef NIX |
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report() /* report progress */ |
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{ |
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extern char *myhostname(); |
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double u, s; |
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#ifdef BSD |
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char hostname[257]; |
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struct rusage rubuf; |
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#else |
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struct tms tbuf; |
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struct utsname nambuf; |
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#define hostname nambuf.sysname |
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> |
double period; |
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#endif |
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|
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tlastrept = time((time_t *)NULL); |
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getrusage(RUSAGE_CHILDREN, &rubuf); |
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u += rubuf.ru_utime.tv_sec + rubuf.ru_utime.tv_usec/1e6; |
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s += rubuf.ru_stime.tv_sec + rubuf.ru_stime.tv_usec/1e6; |
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gethostname(hostname, sizeof(hostname)); |
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#else |
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times(&tbuf); |
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u = ( tbuf.tms_utime + tbuf.tms_cutime ) / CLK_TCK; |
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s = ( tbuf.tms_stime + tbuf.tms_cstime ) / CLK_TCK; |
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uname(&nambuf); |
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#ifdef _SC_CLK_TCK |
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period = 1.0 / sysconf(_SC_CLK_TCK); |
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#else |
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period = 1.0 / 60.0; |
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#endif |
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u = ( tbuf.tms_utime + tbuf.tms_cutime ) * period; |
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s = ( tbuf.tms_stime + tbuf.tms_cstime ) * period; |
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#endif |
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|
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sprintf(errmsg, |
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"%lu rays, %4.2f%% after %.3fu %.3fs %.3fr hours on %s\n", |
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nrays, pctdone, u/3600., s/3600., |
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(tlastrept-tstart)/3600., hostname); |
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(tlastrept-tstart)/3600., myhostname()); |
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eputs(errmsg); |
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#undef hostname |
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#ifndef BSD |
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signal(SIGCONT, report); |
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#endif |
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} |
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#else |
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report() /* report progress */ |
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sprintf(errmsg, "%lu rays, %4.2f%% after %5.4f hours\n", |
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nrays, pctdone, (tlastrept-tstart)/3600.0); |
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eputs(errmsg); |
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signal(SIGCONT, report); |
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} |
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#endif |
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fprtresolu(hres, vres, stdout); |
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/* recover file and compute first */ |
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i = salvage(oldfile); |
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if (i >= vres) |
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goto alldone; |
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if (zfd != -1 && i > 0 && |
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lseek(zfd, (long)i*hres*sizeof(float), 0) == -1) |
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error(SYSTEM, "z-file seek error in render"); |
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else |
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#endif |
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signal(SIGCONT, report); |
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ypos = vres-1 - i; |
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ypos = vres-1 - i; /* initialize sampling */ |
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if (directvis) |
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init_drawsources(psample); |
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fillscanline(scanbar[0], zbar[0], sampdens, hres, ypos, hstep); |
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/* compute scanlines */ |
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for (ypos -= ystep; ypos > -ystep; ypos -= ystep) { |
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hres, ypos, hstep); |
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/* fill bar */ |
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fillscanbar(scanbar, zbar, hres, ypos, ystep); |
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if (directvis) /* add bitty sources */ |
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drawsources(scanbar, zbar, 0, hres, ypos, ystep); |
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/* write it out */ |
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#ifndef BSD |
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signal(SIGCONT, SIG_IGN); /* don't interrupt writes */ |
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} |
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/* clean up */ |
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signal(SIGCONT, SIG_IGN); |
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if (zfd != -1) { |
442 |
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if (write(zfd, (char *)zbar[0], hres*sizeof(float)) |
455 |
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if (zfd != -1 && write(zfd, (char *)zbar[0], hres*sizeof(float)) |
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< hres*sizeof(float)) |
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goto writerr; |
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> |
goto writerr; |
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> |
fwritescan(scanbar[0], hres, stdout); |
459 |
> |
if (fflush(stdout) == EOF) |
460 |
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goto writerr; |
461 |
> |
alldone: |
462 |
> |
if (zfd != -1) { |
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if (close(zfd) == -1) |
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goto writerr; |
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for (i = 0; i <= psample; i++) |
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free((char *)zbar[i]); |
467 |
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} |
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fwritescan(scanbar[0], hres, stdout); |
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if (fflush(stdout) == EOF) |
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goto writerr; |
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for (i = 0; i <= psample; i++) |
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free((char *)scanbar[i]); |
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if (sampdens != NULL) |
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int bl = xstep, b = xstep; |
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double z; |
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register int i; |
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|
494 |
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|
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z = pixvalue(scanline[0], 0, y); |
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if (zline) zline[0] = z; |
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/* zig-zag start for quincunx pattern */ |
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b = fillsample(scanline, zline, 0, y, i, 0, b/2); |
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else |
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b = fillsample(scanline+i-xstep, |
510 |
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zline ? zline+i-xstep : NULL, |
510 |
> |
zline ? zline+i-xstep : (float *)NULL, |
511 |
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i-xstep, y, xstep, 0, b/2); |
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if (sd) *sd++ = nc & 1 ? bl : b; |
513 |
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bl = b; |
525 |
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float zline[MAXDIV+1]; |
526 |
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int b = ysize; |
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register int i, j; |
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|
528 |
> |
|
529 |
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for (i = 0; i < xres; i++) { |
515 |
– |
|
530 |
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copycolor(vline[0], scanbar[0][i]); |
531 |
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copycolor(vline[ysize], scanbar[ysize][i]); |
532 |
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if (zbar[0]) { |
533 |
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zline[0] = zbar[0][i]; |
534 |
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zline[ysize] = zbar[ysize][i]; |
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} |
536 |
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523 |
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b = fillsample(vline, zbar[0] ? zline : NULL, |
536 |
> |
b = fillsample(vline, zbar[0] ? zline : (float *)NULL, |
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i, y, 0, ysize, b/2); |
538 |
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|
538 |
> |
|
539 |
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for (j = 1; j < ysize; j++) |
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copycolor(scanbar[j][i], vline[j]); |
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if (zbar[0]) |
558 |
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COLOR ctmp; |
559 |
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int ncut; |
560 |
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register int len; |
561 |
< |
|
561 |
> |
|
562 |
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if (xlen > 0) /* x or y length is zero */ |
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len = xlen; |
564 |
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else |
565 |
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len = ylen; |
566 |
< |
|
566 |
> |
|
567 |
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if (len <= 1) /* limit recursion */ |
568 |
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return(0); |
569 |
< |
|
570 |
< |
if (b > 0 |
571 |
< |
|| (zline && 2.*fabs(zline[0]-zline[len]) > maxdiff*(zline[0]+zline[len])) |
569 |
> |
|
570 |
> |
if (b > 0 || |
571 |
> |
(zline && 2.*fabs(zline[0]-zline[len]) > maxdiff*(zline[0]+zline[len])) |
572 |
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|| bigdiff(colline[0], colline[len], maxdiff)) { |
573 |
< |
|
573 |
> |
|
574 |
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z = pixvalue(colline[len>>1], x + (xlen>>1), y + (ylen>>1)); |
575 |
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if (zline) zline[len>>1] = z; |
576 |
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ncut = 1; |
564 |
– |
|
577 |
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} else { /* interpolate */ |
566 |
– |
|
578 |
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copycolor(colline[len>>1], colline[len]); |
579 |
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ratio = (double)(len>>1) / len; |
580 |
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scalecolor(colline[len>>1], ratio); |
588 |
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} |
589 |
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/* recurse */ |
590 |
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ncut += fillsample(colline, zline, x, y, xlen>>1, ylen>>1, (b-1)/2); |
591 |
< |
|
592 |
< |
ncut += fillsample(colline+(len>>1), zline ? zline+(len>>1) : NULL, |
591 |
> |
|
592 |
> |
ncut += fillsample(colline+(len>>1), |
593 |
> |
zline ? zline+(len>>1) : (float *)NULL, |
594 |
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x+(xlen>>1), y+(ylen>>1), |
595 |
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xlen-(xlen>>1), ylen-(ylen>>1), b/2); |
596 |
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|
605 |
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{ |
606 |
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static RAY thisray; |
607 |
|
|
608 |
< |
if (viewray(thisray.rorg, thisray.rdir, &ourview, |
609 |
< |
(x+pixjitter())/hres, (y+pixjitter())/vres) < 0) { |
608 |
> |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, &ourview, |
609 |
> |
(x+pixjitter())/hres, (y+pixjitter())/vres)) < -FTINY) { |
610 |
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setcolor(col, 0.0, 0.0, 0.0); |
611 |
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return(0.0); |
612 |
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} |
618 |
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rayvalue(&thisray); /* trace ray */ |
619 |
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|
620 |
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copycolor(col, thisray.rcol); /* return color */ |
621 |
< |
|
621 |
> |
|
622 |
|
return(thisray.rt); /* return distance */ |
623 |
|
} |
624 |
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|
632 |
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int x, y; |
633 |
|
|
634 |
|
if (oldfile == NULL) |
635 |
< |
return(0); |
636 |
< |
|
635 |
> |
goto gotzip; |
636 |
> |
|
637 |
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if ((fp = fopen(oldfile, "r")) == NULL) { |
638 |
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sprintf(errmsg, "cannot open recover file \"%s\"", oldfile); |
639 |
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error(WARNING, errmsg); |
640 |
< |
return(0); |
640 |
> |
goto gotzip; |
641 |
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} |
642 |
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#ifdef MSDOS |
643 |
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setmode(fileno(fp), O_BINARY); |
650 |
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oldfile); |
651 |
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error(WARNING, errmsg); |
652 |
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fclose(fp); |
653 |
< |
return(0); |
653 |
> |
goto gotzip; |
654 |
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} |
655 |
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|
656 |
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if (x != hres || y != vres) { |
674 |
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fclose(fp); |
675 |
|
unlink(oldfile); |
676 |
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return(y); |
677 |
+ |
gotzip: |
678 |
+ |
if (fflush(stdout) == EOF) |
679 |
+ |
error(SYSTEM, "error writing picture header"); |
680 |
+ |
return(0); |
681 |
|
writerr: |
682 |
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sprintf(errmsg, "write error during recovery of \"%s\"", oldfile); |
683 |
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error(SYSTEM, errmsg); |